Choose the word whose underlined part is pronounced differently from that of the others: plants, animals, seasons, trees

There are three rules for pronouncing the s/es ending:

Rule 1: Pronounce /s/ when ending in -p, -k, -t, -f.

Rule 2: Pronounce /iz/ when the word ends in -s,-ss,-ch,-sh,-x,-z,-o,-ge,-ce

Rule 3: Pronounce /z/ for the rest of the words

The underlined part of answer A is pronounced /s/

The remaining answers are pronounced /z/

Choose answer A.